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Question
Earth is protected from ultraviolet radiations by means of
Options:
A .  Ozone layer
B .  Nitrogen
C .  Oxygen
D .  Carbon dioxide
Answer: Option A
:
A
Theozone layeris a naturallayerof gas in the upper atmosphere which protects humans and other living things from the harmful ultraviolet (UV) rays of the sun. Thisozone layerperforms the essential task of filtering out most of the sun's biologically harmful UV radiation.

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